GTF Excell™ delivers chromium the way nature intended; as an organically bound yeast complex. Derived from Brewer’s Yeast, GTF Excell™ provides a true Glucose Tolerance Factor (GTF) complex ensuring better results in the areas of glucose metabolism, insulin resistance and immune system health. In the 1950’s, GTF research paved the way for Chromium to be assigned an RDA, which in turn led to extensive research on the isolated mineral … much of which unfortunately has led to a dead end. However, GTF Excell™ returns Chromium to its successful roots as an organically bound chromium yeast complex.